[LLVMdev] [Segmented Stacks] Week 1

[Peter Lawrence]

Guys,
            regarding alloca.

not only are exceptions a problem here, but just plain old "longjmp".

-Peter Lawrence.



On Jun 1, 2011, at 10:00 AM, llvmdev-request at cs.uiuc.edu wrote:

> ------------------------------
>
> Message: 4
> Date: Tue, 31 May 2011 16:55:07 -0400
> From: Rafael Avila de Espindola <rafael.espindola at gmail.com>
> Subject: Re: [LLVMdev] [Segmented Stacks] Week 1
> To: Sanjoy Das <sanjoy at playingwithpointers.com>
> Cc: llvmdev at cs.uiuc.edu
> Message-ID: <4DE555AB.9050302 at gmail.com>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> On 11-05-30 07:20 AM, Sanjoy Das wrote:
>> Hi!
>>
>> I've attached my first week of work as a patchset for review. This is
>> also available on Github [1].
>>
>> By next Monday I intend to (more or less) finish up the preliminary
>> parts concerning the codegen; and start working on the runtime (so  
>> that
>> I can do a basic sanity check).
>
> Thanks!. Some quick notes
>
> *) Maybe you could add the description you used for the GSoC to the
> segmented-stacks document too? Maybe at the end and under a "not yet
> implemented" section, but having it all in one place is probably  
> useful.
>
> *) You use "stack block" in some places and stacklets in others.
>
> *) You mention that variable sized alloca's are handled by using the
> heap. This is an interesting idea, but you have to be careful to avoid
> leaks if exceptions are enabled.
>
> *) If I remember correctly, you wanted to fold the red zone in the  
> "do I
> need more stack" check, but I seed that you have a
> !EnableSegmentedStacks in the Red Zone check. Have you decided not  
> to do it?
>
> *) You intend for the runtime to be compatible with the gcc one? Their
> stack allocating function is called __morestack...
>
>> [1] https://github.com/sanjoy/llvm/tree/segmented-stacks
>>
>
> Cheers,
> Rafael
>
>
> ------------------------------

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